The best feature of Thoughtless is the nonstop action. There is always the potential for danger, high stakes, big bombs at the ready to be fired, and at least two dealers who are corrupt powerhouses in the asteroid belt. They might even be at odds with each other.
The governing security body, BeltSec, is used like a sheriff vs bounty hunters and entirely corrupt. It's interesting to see characters who are essentially good people working for this company and taking bribes and such. There are also a few equally corrupt corporations that seem to be running things in the belt. I would have liked a little more from this aspect but it's enough to know that they're there and funding a lot of the aforementioned corruption.
Which brings me to the main point - so who is funding terrorist attacks? What do they want? Is it linked to the telepathic compulsions that the main character experiences? Delokita and her her two friends have to figure it out before anyone else gets hurt, or Del gets murdered. The ongoing mystery kept the action more interesting.
I actually liked the characters too. Del is bad ass, and fights a nagging sense of not being good enough for anyone that causes her to act big and act out towards her friends sometimes. I think we can all relate to that. I liked the female friendship and how we were never really sure who was going to betray who or who was actually loyal.
On the audiobook: I liked Deborah Reeves' narration! She brought a lot of excitement and emotion and dialect to the book. Some female narrators trip over male voices and sound flat but not here. ALSO THANK YOU FOR READING THE AUTHORS NOTE!! Not nearly enough audiobooks include the authors note and about the author sections. I would listen to more by Reeves any day.
Overall: I liked this one a lot. There's enough action and mystery and bad ass characters to keep any action fan invested. I think there's room for a sequel too if he ever goes back to it